[GlobalISel] Introduce G_BUILD_VECTOR, G_BUILD_VECTOR_TRUNC and G_CONCAT_VECTOR opcodes.
These opcodes are intended to subsume some of the capability of G_MERGE_VALUES,
as it was too powerful and thus complex to add deal with throughout the GISel
pipeline.
G_BUILD_VECTOR creates a vector value from a sequence of uniformly typed
scalar values. G_BUILD_VECTOR_TRUNC is a special opcode for handling scalar
operands which are larger than the destination vector element type, and
therefore does an implicit truncate.
G_CONCAT_VECTOR creates a vector by concatenating smaller, uniformly typed,
vectors together.
These will be used in a subsequent commit. This commit just adds the initial
infrastructure.
Differential Revision: https://reviews.llvm.org/D53594
llvm-svn: 348430
diff --git a/llvm/test/Verifier/gisel-g_concat_vector.mir b/llvm/test/Verifier/gisel-g_concat_vector.mir
new file mode 100644
index 0000000..640c4a4
--- /dev/null
+++ b/llvm/test/Verifier/gisel-g_concat_vector.mir
@@ -0,0 +1,29 @@
+#RUN: not llc -o - -global-isel -run-pass=none -verify-machineinstrs %s 2>&1 | FileCheck %s
+# REQUIRES: global-isel, aarch64-registered-target
+--- |
+ target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
+ target triple = "aarch64-unknown-unknown"
+
+ define i32 @g_concat_vectors() {
+ ret i32 0
+ }
+
+...
+---
+name: g_concat_vectors
+legalized: true
+regBankSelected: false
+selected: false
+tracksRegLiveness: true
+registers:
+ - { id: 0, class: _, preferred-register: '' }
+ - { id: 1, class: _, preferred-register: '' }
+liveins:
+body: |
+ bb.0:
+ ; CHECK: Bad machine code: G_CONCAT_VECTOR num dest and source elements should match
+
+ %0(<2 x s32>) = IMPLICIT_DEF
+ %1(<2 x s32>) = IMPLICIT_DEF
+ %2:_(<2 x s32>) = G_CONCAT_VECTORS %0, %1
+...